to all, STATEMENT: the bible is clear, we can KNOW the Godhead, scripture, Romans 1:19 "Because that which may be known of God is manifest in them; for God hath shewed it unto them." Romans 1:20 "For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:"
what things was made that we can know the Godhead? well of course "US". Genesis 1:26 "And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth."
but was not God a single person when he made man? yes this is the beauty of God in the ECHAD as First/LORD, and Last/Lord. just as the very next verse states,
Genesis 1:27 "So God created man in his own image, in the image of God created he him; male and female created he them."
so how is this a revealing of the Godhead.... in the making man "male and female". for the term Adam mean, here at Genesis 1:26, is "ANOTHER" of ONE-SELF. BINGO, that's God's plurality, or ECHAD of himself in Flesh. for the term Adam itself can be translated in the (kjv), as "ANOTHER". using the Mickelson's Enhanced Strong's Dictionaries of the Greek and Hebrew Testaments, ADAM:
H120 אָדָם 'adam (aw-dawm') n-m.
ruddy i.e. a human being (an individual or the species, mankind, etc.).
[from H119]
KJV: X another, + hypocrite, + common sort, X low, man (mean, of low degree), person.
Root(s): H119
there it is... "X another", just as G243 Allos or "ANOTHER" defind the ECHAD of God in NUMERICAL DIFFERENCE, of Firsdt and Last, according to the Vine's Expository Dictionary of New Testament Words allos is defined, or expresses, "a numerical difference and denotes another of the same sort". this numerical difference is just what the ECHAD is in definition at Deuteronomy 6:4, a numerical difference of the same ONE PERSON/ or as G243 allos states, "the same sort", or the same person. now the clear understanding of the term God is clearly before us, the H430 אֱלֹהִים 'elohiym (el-o-heem') in Genesis 1:1. it is the Ordinal First and Last of God the H433 אֱלוֹהַּ 'elowahh (el-o'-ah) in TIME, PLACE, RANK, and ORDER. this proves that God is a ECHAD of one person within himself in TIME, PLACE, RANK, and ORDER. this answer the plurality of God in the OP.
now we need to understand HOW or the mechanism of this plurality. and MY "ANSWER" is EQUAL SHARE, God is the EQUAL of himself in Flesh. because God cannot be divided, separated, or distinct from himself...... let me say this again, "God cannot be divided, separated, or distinct from himself."
now if anyone have a better explanation of his plurality, please post it.
PICJAG, 101G.